package com.liteng.shadow.core.utils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Md5Util
{
  private static final String[] strDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
  
  private static String byteToArrayString(byte bByte)
  {
    int iRet = bByte;
    if (iRet < 0) {
      iRet += 256;
    }
    int iD1 = iRet / 16;
    int iD2 = iRet % 16;
    return strDigits[iD1] + strDigits[iD2];
  }
  
  private static String byteToString(byte[] bByte)
  {
    StringBuffer sBuffer = new StringBuffer();
    for (int i = 0; i < bByte.length; i++) {
      sBuffer.append(byteToArrayString(bByte[i]));
    }
    return sBuffer.toString();
  }
  
  public static String getMD5Code(String strObj)
  {
    try
    {
      MessageDigest md = MessageDigest.getInstance("MD5");
      
      return byteToString(md.digest(strObj.getBytes()));
    }
    catch (NoSuchAlgorithmException ex)
    {
      ex.printStackTrace();
    }
    return strObj;
  }
}
